Evaporative condenser



Jan. 3, 1939. E. F. FISHER EVAPORATIVE CONDENSER Filed June 11, 1937 30 is arranged tangentially to the Wall of section 2 40 the lower ends thereof converging inwardly and' diaphragm 5 and fioWS through the oriiice .26 40' 45 welded to diaphragm 6. A series -ofclamps I3 The hot gases enterinlet I4 andare condensed 45 Verified-type exehengeriandf-the seotionstbereor nemers; .any unevaporated Water tends to inf 570 maybe increased to' completelynll the cross sec` g vis located centrally at the upper end of section cond nsing surface. .The sensible heat and the Patented Jan. 3, 1939 f UNITED STATES PATENT OFFICE EVAPORATIVE CONDENSER Ernest F. Fisher, Springeld, Ill.

Application June 11, 1937, Serial No. 147,782

7 claims. (ci. 257-37) This invention relates to an evaporative coni I and terminates at its lower end in a drip plate denser and has, for its main object, to provide a I8. A spray and air defiector cone I9 is shown device adapted to condense and cool gases by Supported on the plate |8- A Series of lugs 20 indirect transfer of heat therefrom Vthrough conwelded to the wall of section I support a cover 5 densing surfaces, which heat is mainly taken up plate 2| Which, in turn. Supports the eliminator 5 by and used to evaporate a part of a spray of I6. The air outlet orifice is shown at 22.

cooling water which is caused to pass over the Cooling Water iS forced by a pump frorn Section condensing surface entrained in a -stream of 2 by Way of a conduit 23 thence t0 a feed pipe cooling air. 24 which is connected to a spray head or nozzle Another object'l is 1;() provide a, gondenser 25. This nOZZle S IOCated in the aXS 0f and C1086 10 wherein the condensing surfaces are contacted to the Oriee 25 and the high Velocity air Vortex by a mixture of air and water whereby the water breaks up the water from the nozzle 25 and the is partly evaporated; the portion not evaporated ne Spray created thereby iS distributed uniformbeing returned to bel entrained again with the 1y with the air over the coils by the air Swirlif, incoming stream of fresh air, cooled thereby, and The flange 8 deneS a circular orice 26 poSi- 15 reoircu1ated with fresh air to again Contact the tioned centrally of the vortex created in section 2 condensing surfaces in a, continuous cycle. and the mixture 0f Water and an Passes from I one form 0f apparatus adapt-,ed to provide section 2 through this orifice at high velocity as these and other objects to be described is shown a Swirl into-the main section l. The nozzle 25 in the accompanying drawing wherein- I is positioned in the axis of the helical current 20 Figure 1 is a plan view, partly in section, of l'of air and water. The level of water in section a condenser designed according to my invention; 2 S mantained constant preferably by a make- Fig- 2 is a viewin section, on line 2 2 of up water inlet 21 controlled in a well known Fig, 1; and manner by a float operated valve not shown.

Fig 3 is a View in section on une 3 3 of Fig In operation, water is sprayed from the nozzle 25 2 Showing Warped blades. 25 and air enters from'inlet 3 and is caused to The condenser Shown comprises a main heat' SWII around and through the VaneS 9 which d1- ex'change Section and a combined air inlet and rect the air through orifice 26. This orice prowater cooling Section 2 The fresh air inlet; 3 duces a high velocity vortex which entrains and `further breaks up the water spray from nozzle and is provided with a blower unit 4. VA bame 5 25 Causing the mixture of air and water to wipe 'is positioned to deflect the air stream towards a maximum Surface of the heat exchanger. The the wall-.of section 2 and causeamore effective air then peSSeS through the eliminator l5 and swir1of air in that section. A ring-shaped diavout at outlet 22. Any entrained Water sepapnragm s is shown as hanged at 1 and s. The rated bythe eliminator drops from the edge of 35 flange 1 engages the upper edge of section. 2. plate I8 onto the upper coil sections. A. portion The ange 8 provides a support for a spaced seof thev entrained water is evaporated by heat ries of narrow elongatedvvanes 9- thatA are arfrom 4coils II while the balance of this water rangedv in a conical formation with warped edges, drips -fronl the exchanger Surfaces onto the being connected to a ring I0. l Where .itis again subjected to the vortex of air A heat vexchanger II in the form `of a 'spiral and is cooled. A portion of this cooled water coil is vmounted in the main section 'I' and is is entrained in the vortex of fresh air and the v shown as supported on blookg |2 wmohv maybe balance ows to the -lower portion of section 2.

serveto retain and brace the coil memberfWhile and flowk out at outlet vI5 which drains into a `a coiljform ofexchanger isvshown, variouswell receiver. l w v i, knownequivalents,.maynbekused,for' example; a,v .In the *priori art' typesisof evaporative con.l

crease intemperat'urelunle'ss -just enough is sup- Y50j .v tional area of section I. The gases to be cooled plied to the Coils tobecolnpietely evaporated and and condensed are admitted at inlet I4 and leave this is diilcult'to achieve.- In my condenser,v the l as liquid at outlet I5; A spray eliminator I6 water is rst reduced to near the wet bulb tem- .3 comprising la circular series of radial baiiies vI'IV perature and then partially evaporated on the heat of vaporization are utilized and a greater cooling eect is obtained. The air that is blown over the condensing surface is the air that has cooled the water and this airis mixed with the cooled water. Fresh air is taken in continuously to cool the water. The air that is blown over the candensing surface has taken up some moisture from the water during its cooling. This air may or may not be saturated. Better heat transfer is obtained through the condensing surface with a mixture of cooled water and air at or near the wet bulb temperature and equivalent relative humidity than can be obtained by blowing untreated air and water over this surface at the same temperature.

What I claim is:

1. An evaporative condenser comprising a tank having an inner wall an upper section and a lower section, a heat exchanger positioned within the upper section, means to spray a cooling liquid into said upper section whereby a portion of the liquid will flow into the lower section, an air inlet positioned tangentto the lower section, means to force air into said inlet, said air mixing with said liquid in the lower section whereby to cool said liquid, portions of said liquid being broken up and entrained with the air and being carried thereby upwardly over said heat exchanger.

2. In a device as set forth in claim 1, a vertically extending baiile positioned in the path of air from the inlet and being formed to direct air towards the inner wall of the tank.

3. Ina device as set forth in claim l, a'transverse diaphragm below said exchanger and having an orice, a series of spaced Warped blade members positioned opposite to the air inlet and extending downwardly and inwardly to form a conical shape for deilecting cooling air and liquid through the orifice towards the upper section and over said exchanger.

4. An evaporative condenser comprising a tank, a heat exchange element for receiving material to be cooled arranged in the upper portion of said tank, an inlet for forcing cooling air into said tank adjacent the lower end thereof, a transverse diaphragm below said element, said diaphragm being provided with a central orifice, a series of spaced blades positioned in the lower end of the tank opposite said inlet, and adjacent said orice, a liquid spray above said diaphragm, the air from amava? said inlet being directed to flow betweenl said blades and then upwardly as a vortex to entrain and break up liquid from said spray and force the liquid against the heat exchange element.

5. A condenser comprising a tank, a heat exchange element for receiving material to be cooled air passes through the orifice, said air stream vortex acting to entrain and break up the liquid spray and cause same to impact the heat exchange element.

6. An evaporative condenser comprising a tank, a heat exchange element for receiving material to be cooled arranged in the upper portion of said' tank, an inlet for forcing cooling air into said,

tank adjacent the lower end thereof, a transverse v diaphragm below said element, said diaphragm being provided with a central orifice, means positioned above said orifice for spraying cooling liquid, said inlet being arranged tangent to the tank, the air from said inlet being directed to flow upwardly through said orifice as-a vortex to entrain and break up liquid from said spray and force same against the heat exchange element.

7. An evaporative condenser comprising a tank, a heat exchange element in the form of a spiral coil for receiving material to be cooled and arranged in the upper portion of said tank, an inlet for forcing cooling air into said tank adjacent the lower end thereof, a transverse diaphragm below said element, said diaphragm being provid-l ed with a central orifice, means positioned above said orifice for spraying cooling liquid, said element being supported on said diaphragm concentrically with said orice, said inlet being arranged. tangent to the tank, the air from said inlet being directed to ow upwardly through said orifice as a vortex to entrain and break up liquid from said spray and force same against the heat exchange element.

ERNEST F. FISHER. 

